Anything like that would be optional if it was integrated.
Hey, I've been observing your game for quite a while now and after this update I've decided to become your patron. Your script is really good, many levels higher than 99% of the games out there. Visuals complement it nicely as well.
However I'd like to warn you that if you engage too much into NTR related content you may lose some of your patrons.
Majority of the people is very sensitive when it comes to this genre and on the other hand vanilla tropes are defnitely most popular among the masses and will net you more support and recognition over period of time. Hence it's not too late to reconsider.
Personally I don't mind NTR at all, but I know what I've seen when it comes to reactions to this kind of content and they usually aren't too good. This may really impede your development.
There has been this eternal conflict between vanilla fags and ntr lovers(I'd like to say discriminatory term "cucks" but ntr isn't about cuckoldry alone, there are different kinds) for years now after all...go see any ntr doujin and you will almost always find a comment like "death to all cucks" haha. This shit will never change.